Göttingen 2012 – scientific programme

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T: Fachverband Teilchenphysik

T 17: Beyond the Standard Model (Theorie) 3

T 17.2: Talk

Wednesday, February 29, 2012, 17:00–17:15, VG 3.102

Can there still be chiral fermions beyond the Standard Model? — •Alexander Knochel — ITP Heidelberg

I discuss the current theoretical and phenomenological constraints on additional chiral fermions beyond the three Standard Model generations of quarks and leptons. While the conventional fourth generation is virtually ruled out from Higgs searches, direct searches and perturbativity, other fermion representations are still in better shape in this respect. We derive the bounds on Higgs masses and exotic fermion masses from perturbativity and vacuum stability, and relate the different scenarios to current Higgs searches at the LHC.